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the ptr of empty static arrays doesn't point to "null".
for dynamic arrays ptr points to "null".

test cases:
http://svn.kuehne.cn/dstress/run/ptr_03.d
http://svn.kuehne.cn/dstress/run/ptr_04.d

Thomas


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On Wed, 1 Dec 2004 13:08:25 +0100, Thomas Kuehne <thomas-dloop@kuehne.thisisspam.cn> wrote:

>
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> the ptr of empty static arrays doesn't point to "null".
> for dynamic arrays ptr points to "null".
>
> test cases:
> http://svn.kuehne.cn/dstress/run/ptr_03.d
> http://svn.kuehne.cn/dstress/run/ptr_04.d
>
> Thomas
>
>
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Isn't this expected? Static arrays (as in, type[const] foo;) are
on the stack by definition, therefore have a ptr. Dynamic arrays
are allocated, and (for C compatibilty?) are null'ed when set to
length 0.
(I know you know this, btw, just asking why this surprises you)

If you read std.stream's buffered stream class, you can see Walter
has kept the buffer array with at least 1 value so it keeps an
address. (Again, for some arcane reason)

-- 
"Unhappy Microsoft customers have a funny way of becoming Linux,
Salesforce.com and Oracle customers." - www.microsoft-watch.com:
"The Year in Review: Microsoft Opens Up"

"Changes/Additions
--------------------------------------------------------------------------------
HL2DM released! "
- HL2DM changelog
"#$#@% YES!"
- ME

Simon Buchan schrieb am Donnerstag, 2. Dezember 2004 16:35:
> On Wed, 1 Dec 2004 13:08:25 +0100, Thomas Kuehne <thomas-dloop@kuehne.thisisspam.cn> wrote:

>> the ptr of empty static arrays doesn't point to "null".
>> for dynamic arrays ptr points to "null".

> Isn't this expected? Static arrays (as in, type[const] foo;) are
> on the stack by definition, therefore have a ptr. Dynamic arrays
> are allocated, and (for C compatibilty?) are null'ed when set to
> length 0.
> (I know you know this, btw, just asking why this surprises you)

I somehow mixed mixed up pointer to pointer and static arrays...

Thanks, I fixed the test case.

Thomas